id	domain	url
dpc-1580	doi.org	https://doi.org/10.5826/dpc.1103a75
dpc-1580	ods.od.nih.gov	https://ods.od.nih.gov/factsheets/vitamina-healthprofessional/
dpc-1580	www.fda.gov	https://www.fda.gov/food/buy-store-serve-safe-food/whatyou-need-know-about-dietary-supplements
dpc-1580	www.accessdata.fda.gov	https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr
dpc-1580	www.accessdata.fda.gov	https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr
dpc-1580	www.fda.gov	http://www.fda.gov/food/dietary-supplements-guidance-documents-regulatory-information/dietary-supplement-labeling-guide-chapter-iv-nutrition-labeling